Re: Sample damaging during XRD

2017-05-22 Thread Peter Y. Zavalij 
>From my experience some transition metal oxides, like MoO3, WO3 etc, turns
slowly blue under X-tay, assumedly due to metal reduction.
Peter Zavalij

On May 22, 2017 10:00 AM, "Payzant, E. Andrew" <payza...@ornl.gov> wrote:

> You can run into “interesting” behavior with metastable phases. I once ran
> a sample that gradually transformed from the “high temperature” structure
> to the “low temperature” under x-ray illumination. The two phases were red
> and yellow, so it was very obvious where the x-ray beam had illuminated the
> powder.
>
>
>
> Andrew
>
>
>
> *
>
>
>
> Dr. E. Andrew Payzant
>
> Engineering Materials Group Leader
>
> Chemical and Engineering Materials Division
>
> Neutron Sciences Directorate
>
> Oak Ridge National Laboratory
>
>
>
> 1 Bethel Valley Road
>
> Bldg. 8600, Room B-438, Mailstop 6475
>
> Oak Ridge, TN 37831-6475
>
> USA
>
>
>
> Phone: (865) 576-2164
>
> cell: (865) 235-4981
>
> email: payza...@ornl.gov
>
> *http:/neutrons.ornl.gov/cemd/ <http://neutrons.ornl.gov/cemd/>*
>
> http://www.researcherid.com/rid/B-5449-2009
>
> *http://orcid.org/-0002-3447-2060
> <http://orcid.org/-0002-3447-2060>*
>
> **
>
>
>
>
>
> *From: *<rietveld_l-requ...@ill.fr> on behalf of Edward Laitila <
> ealai...@mtu.edu>
> *Reply-To: *Edward Laitila <ealai...@mtu.edu>
> *Date: *Monday, May 22, 2017 at 8:19 AM
> *To: *Shay Tirosh <stiro...@gmail.com>
> *Cc: *Rietveld list <rietveld_l@ill.fr>
> *Subject: *Re: Sample damaging during XRD
>
>
>
> There should be no damage but you may see a slit change in color where the
> beam hits the sample, a temporary change in the color center. I suggest
> running your generator at 45 kV and 35 mA you will get more intensity.
>
>
>
> Cheers,
>
> Ed
>
>
>
> On Sun, May 21, 2017 at 12:21 PM, Shay Tirosh <stiro...@gmail.com> wrote:
>
> Dear Rietveldrs
>
>
>
> Do you know any damaging to sample that may happen during long scanning
> time say (3h).
>
> Specifically in case the  x-ray source is Cu with Ka1+Ka2 that operates
> under 40mA and 40kV and the sample is metal oxides
>
>
>
> Please suggest on ref or book that elaborate on this topic.
>
>
>
> Thanks
>
>
>
> Shay
>
>
>
>
>
>
>
>
> --
>
> _
>
>
>
> Dr. Shay Tirosh
>
> Institute for Nanotechnology & Advanced Materials
>
> Bar Ilan University
>
> Ramat Gan, 52900
>
> Israel
> Phone: +972-(0)30-531-7320
>
> Mobile: +972-(0)54-8834533 <+972%2054-883-4533>
>
> Email: stiro...@gmail.com
>
> _
>
>
> ++
> Please do NOT attach files to the whole list <alan.he...@neutronoptics.com
> >
> Send commands to <lists...@ill.fr> eg: HELP as the subject with no body
> text
> The Rietveld_L list archive is on http://www.mail-archive.com/
> rietveld_l@ill.fr/
> ++
>
>
>
>
>
> --
>
> Dr. Edward A. Laitila
>
> Senior Research Engineer/Scientist II/Adjunct Assistant Professor
>
> Michigan Technological University
>
> Dept. of MSE
>
> Room 628 M Building
>
> (906) 369-2041
>
> ++
> Please do NOT attach files to the whole list <alan.he...@neutronoptics.com
> >
> Send commands to <lists...@ill.fr> eg: HELP as the subject with no body
> text
> The Rietveld_L list archive is on http://www.mail-archive.com/
> rietveld_l@ill.fr/
> ++
>
>
>
++
Please do NOT attach files to the whole list <alan.he...@neutronoptics.com>
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++

Re: Sample damaging during XRD

2017-05-22 Thread Payzant, E. Andrew 
You can run into “interesting” behavior with metastable phases. I once ran a 
sample that gradually transformed from the “high temperature” structure to the 
“low temperature” under x-ray illumination. The two phases were red and yellow, 
so it was very obvious where the x-ray beam had illuminated the powder.

Andrew

*

Dr. E. Andrew Payzant
Engineering Materials Group Leader
Chemical and Engineering Materials Division
Neutron Sciences Directorate
Oak Ridge National Laboratory

1 Bethel Valley Road
Bldg. 8600, Room B-438, Mailstop 6475
Oak Ridge, TN 37831-6475
USA

Phone: (865) 576-2164
cell: (865) 235-4981
email: payza...@ornl.gov
http:/neutrons.ornl.gov/cemd/<http://neutrons.ornl.gov/cemd/>
http://www.researcherid.com/rid/B-5449-2009
http://orcid.org/-0002-3447-2060
**


From: <rietveld_l-requ...@ill.fr> on behalf of Edward Laitila <ealai...@mtu.edu>
Reply-To: Edward Laitila <ealai...@mtu.edu>
Date: Monday, May 22, 2017 at 8:19 AM
To: Shay Tirosh <stiro...@gmail.com>
Cc: Rietveld list <rietveld_l@ill.fr>
Subject: Re: Sample damaging during XRD

There should be no damage but you may see a slit change in color where the beam 
hits the sample, a temporary change in the color center. I suggest running your 
generator at 45 kV and 35 mA you will get more intensity.

Cheers,
Ed

On Sun, May 21, 2017 at 12:21 PM, Shay Tirosh 
<stiro...@gmail.com<mailto:stiro...@gmail.com>> wrote:
Dear Rietveldrs

Do you know any damaging to sample that may happen during long scanning time 
say (3h).
Specifically in case the  x-ray source is Cu with Ka1+Ka2 that operates under 
40mA and 40kV and the sample is metal oxides

Please suggest on ref or book that elaborate on this topic.

Thanks

Shay




--
_

Dr. Shay Tirosh
Institute for Nanotechnology & Advanced Materials
Bar Ilan University
Ramat Gan, 52900
Israel
Phone: +972-(0)30-531-7320
Mobile: +972-(0)54-8834533<tel:+972%2054-883-4533>
Email: stiro...@gmail.com<mailto:stiro...@gmail.com>
_

++
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Send commands to <lists...@ill.fr<mailto:lists...@ill.fr>> eg: HELP as the 
subject with no body text
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++




--
Dr. Edward A. Laitila
Senior Research Engineer/Scientist II/Adjunct Assistant Professor
Michigan Technological University
Dept. of MSE
Room 628 M Building
(906) 369-2041
++
Please do NOT attach files to the whole list <alan.he...@neutronoptics.com>
Send commands to <lists...@ill.fr> eg: HELP as the subject with no body text
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++

Re: Sample damaging during XRD

2017-05-22 Thread Edward Laitila 
There should be no damage but you may see a slit change in color where the
beam hits the sample, a temporary change in the color center. I suggest
running your generator at 45 kV and 35 mA you will get more intensity.

Cheers,
Ed

On Sun, May 21, 2017 at 12:21 PM, Shay Tirosh  wrote:

> Dear Rietveldrs
>
> Do you know any damaging to sample that may happen during long scanning
> time say (3h).
> Specifically in case the  x-ray source is Cu with Ka1+Ka2 that operates
> under 40mA and 40kV and the sample is metal oxides
>
> Please suggest on ref or book that elaborate on this topic.
>
> Thanks
>
> Shay
>
>
>
>
> --
> _
>
> Dr. Shay Tirosh
> Institute for Nanotechnology & Advanced Materials
> Bar Ilan University
> Ramat Gan, 52900
> Israel
> Phone: +972-(0)30-531-7320
> Mobile: +972-(0)54-8834533 <+972%2054-883-4533>
> Email: stiro...@gmail.com
> _
>
> ++
> Please do NOT attach files to the whole list  >
> Send commands to  eg: HELP as the subject with no body
> text
> The Rietveld_L list archive is on http://www.mail-archive.com/
> rietveld_l@ill.fr/
> ++
>
>
>


-- 
Dr. Edward A. Laitila
Senior Research Engineer/Scientist II/Adjunct Assistant Professor
Michigan Technological University
Dept. of MSE
Room 628 M Building
(906) 369-2041
++
Please do NOT attach files to the whole list 
Send commands to  eg: HELP as the subject with no body text
The Rietveld_L list archive is on http://www.mail-archive.com/rietveld_l@ill.fr/
++